Producer well plugging for in situ combustion processes

Details Producer well plugging for in situ combustion processes Producer well plugging for in situ combustion processes

E - Fixed Constructions

21

B

E21B 43/243 (2006.01) E21B 33/13 (2006.01)

Patent

CA 2684600

Methods and apparatus relate to controlling location of inflow into a production well during in situ combustion. The production well includes intervals closable to the inflow at identified times. Once a combustion front from the in situ combustion passes one of the intervals, a blockage conveyed from surface into the production well forms a barrier to the inflow at the interval that has been passed by the combustion front. An example of the blockage includes a cement plug delivered through coiled tubing into the production well, which may include production tubing that defines the intervals based on at least two consecutive alternating lengths of solid wall sections and slotted or perforated sections of the production tubing.

L'invention porte sur des méthodes et des appareils permettant la comman de l'emplacement d'écoulement dans un puits de production pendant une combustion in situ . Le puits de production comprend des intervalles pouvant se fermer au débit entrant à des moments identifiés. Une fois que le front de combustion de la combustion in situ passe un des intervalles, un blocage transporté à partir de la surface dans le puits de production forme une barrière au débit à l'intervalle que le front de combustion a passé. Un exemple de blocage inclut un bouchon de ciment livré par un tube spiralé dans le puits de production, qui peut inclure une colonne de tubage qui définit les intervalles selon au moins deux longueurs alternantes consécutives de sections de parois solides et de sections à fentes ou à perforations de la colonne de tubage.

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